Gage-cock.



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" GAGE com.

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IEAZRBY H. MCCLELLAND, OF TUCSON, ARIZONA.

GAGE-COCK.

Specification of Letters Patent.

Patented Nom 2?, 1917.

Application led June 12, 1916. Serial No. 103,259.

To all rwhom it may concern:

Be it known that I, EARBY H. MCCLEL- LAND, a citizen of the United States, residing at Tucson, in the county of Pima and State of Arizona, have invented new and useful Improvements in Gage- Cocks, of which the following is a specification.

This invention relates to a gage cock for boilersand is particularly adaptable for use upon locomotives.

It is an object of this invention to provide a gage cock having a valve adapted to be closed by means of an adjustable member acting in cooperation with the internal pressure of the boiler to properly seat the valve upon its seat.

Another object is to provide simple and effective means for insuring that the conduit leading from the valve to the spigot may be readily cleaned and the slime therein allowed to be removed ina semi-automatic manner.

Another object is to provide a gage cock construction in which the valve therein is not liable to stick either by the presence of foreign material deposited within the valve conduit' and around the valve stern or the effect due to the expansion of the parts by heat.

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Another object is to provide simple means whereby the valve and its seat may be ground to tit Without removing any of the parts from the device or dismantling it from the boiler.

It is a further object to provide a gage cock which is simple in construction and is not liable to leak.

Other objects will appear hereinafter.

. The invention is illustrated in the accompanying drawings in which:

Figure 1 is a view in side elevation showing the gage cock as mounted upon a boiler which is shown in a fragmentary manner.

Fig. 2 is a view in longitudinal vertical section as seen on a plane similar to that of Fig. 1.

Fig.. 3 is a view in transverse vertical section as seen on the line 3-3 of Fig. 1 and looking in the direction of the arrow, said view particularly illustrating the disposition of the cleaning vanes upon the valve stein.y

U Fig. 4 is a view in transverse vertical sectlon as seen on the line 4 4 of Fig. 1.

Referrlng to the drawings more particularly, 10 indicates a fragmentary portion of a boiler head which is provided with a threaded opening 11 Within which a threaded end 12 of a gage cock casing 13 is secured. The casing 13 extends horizontally from the boiler head and is composed of a central cylindrical Lody portion 14 through which a bore 15 extends. An enlarged spherical portion 16 is formed approximately mid-Way the length of the cylindrical member and has anenlarged chamber 17 within it. said chamber being in communication with a spigot or nipple 18 which extends vertically and downwardly and is formed with a bore 19 in communication with the chamber 17 which in turn communicates directly with the centrai bore 15 hereinbetore described. A hexagonal enlargement 2O is formed upon the cylindrical portion at a convenient point adjacent the boiler head, said portion being provided to facilitate in mounting the device Within its threaded opening 11. T he outermost end of the cylindrical body member is formed with a thread 21 which is engaged by a packing cap 22 adapted to torce a packing member 23 within a packing gland 24 formed as a counterbore Within the end of the casing member and in communication y with the central opening 17.

The end of the cylindrical casing which proiects Within the boiler head is formed with a conical valve seat 25 which is sub'- stantially a continuation of the wall ot' the central opening 15. The valve seat 25 is provided for the reception of a conical valve member 26 which is adapted to normally seat thereupon and is formed integral with ay cylindrical stem 27 which extends through the opening 15 and is of a diameter slightly less than said opening. The portion of the stem extending from within the enlargement 17 and outwardly is of a diameter less than that of the portion 27 and is indicated by the numeral 28. A knurled nut 29 is secured upon the outer end of the reduced portion 28 and adapted. to rotate the entire stem Within the sleeve Jwhich extends through lill@ the stuffing member 23 and into threaded engagement with the portion 3l. of the central opening 15. The inner terminating end of the sleeve 30 is adapted to abut against the shoulder formed b y the enlarged portion of the stem 27. It will be here noted that a space 32 is provided between the knul-led nut and a handle grip 33 formed integral with 'the outer end oi' the sleeve 30 for a purpose which will be hereafter disclosed. A' 'series of vanes 34 extend longitudinally of the stem portion 27 and terminate a short distance back of the valve member 26. These vane members are of a diameter slightly less than that of the inside diameter of the open ng l5 and are here shown as three in numer. V In' the operation of this gage cock when it is desired to test the boiler in order to determine the water level therein, the hand grip 33 is rotated in a direction to advance the sleeve 30 through the packing box and against the shoulder formed integral with the valve stem 27. This action will force the valve member 26 from its seat and allow the water to pass between the vanes 34 and along the opening 15 to the nipple lwhere it will be drained off. In the event that the valve sticks, the sleeve 3Q may be relieved from the shoulder on the valve stem and the knurled nut given a blow with a suitable tool. This will allow the stem to be advanced a distance provided by the space 32 previously described. In Vcase the opening 15 is obstructed with a foreign deposit, the knurled nut is twirled between the thumb and forefinger and the valve stem thus rotated. This action causes the vanes 3i to cut the deposit and allow the water to enter the opening y1,5 and Vsubsequently pass therethrough to the opening `1S) in the nipple 18. In this manner slime or other deposit may Ibe readily removed without dismantling the age. gone disadvantage of gage cocks in common use is that their valves do not seat proparly' .after .Short usas@ and Consequently cause the device to leak until the valves are reground. 1n this device the valves may be ground without removing any part of the gage cock by means of the thumb nut 29 which is rotated and in tur-n causes the valve member 26 to grind its own seat upon the conical seat portion 25, the lost motion as ildieated at 32 making it possible for the pressure within the boiler to force the valve lite-Wbt? @geen its seat' during; #sie grinding eperation.. 4

W ll'operateeiltlvelv Without danser of i in .meenemen-sirkiss. vree its seat in a' ,munication therewith, a draw-off member in ll A thusloe ...seen l have provided.

xed manner as well as to provide means for cleaning the slime from the device and grinding a valve seat without dismantling the gage. l

'l claim:

l. ln a gage cock, the combinationv with a boiler, of a gage cock casing secured therein, a longitudinally extending bore formed through said casing and in communication with the boiler` a conical valve seat formed at the termination of said bore and in comcommunication with said bore, a conical valve member adapted to seat upon said conical valve seat, .a valve stem of a differential diameter Ylornied integral with said valve member, and forming a passagewith to said draw-od member, a series of radially disposed cleaning vanes formed upon the valve stem and adjacent the conical valve member, a threaded valve actuating sleeve mounted within the casing and adapted to act against the shoulder formed on the valve stem at the point where the stem is reduced in diameter, a packing member detachably mounted upon the outer end of the casing and adapted to incase the sleeve, and means whereby the conical Vvalve member may be rotated and reciprocatedindependent of 4the movement of the valve actuating sleeve.

2. In a gage cock, the combination with a boiler, of a gage cock casing secured therein, a longitudinally extending bore formed i through said casing and in communication with the boiler. a conical valve seat formed at the termination of said bore and in com.- munication therewith, a draw-ofi member in communication with said bore, .a conical valve member adapted to :seat upon said conical valve seat, avalve stem of a difier-V ential diameterformed integral with ,saidvalve member land `iforming a passagewith said bore leading from said valve member to said draw-od member, al series of radially disposed cleaning vanes formed uponv the valve stem. and adjacent the conical valve member, a threaded valve actuating sleeve mounted within the casing and adapted to act against the shoulderliormed on the valve stem at the point where the stem is reduced in diameter, and means whereby the conical valve membermay be rotated and reciprocated independent of the movement of the valve actuating. sleeve.

3. ,In a gage cock, the combination with a boiler, of a gage cock 4casing secured .therein, a longitudinally 4extending bore formed through said. casing and in communication with the boiler, a conicalvalve seat Vform-ed at the termination` of .said bore and in coni-l inun-ication therewith, a drawfo member in. 125 @Gemeenten with and :bora carica said bore leading 'from said valve member i @einem W valve member adapted to seat upon said conical Valve seat, a valve stem of a diierential diameter formed integral with said valve member and forming a passage with said bore leading from said valve member to said draw-ofi' member, a threaded Valve actuating sleeve mounted Within the casing and adapted to act against the shoulder formed on the valve stem at the point Where the stem is reduced in diameter, and means tu whereby the conical Valve member may be rotated and recprocated independent of the movement of the valve actuating sleeve.

In testimony whereof I have signed my name to this specification.

EARBY H. MCCLELLAND.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente Washington, D. 4E. 

